Smoke-consuming furnace



Mar. 6, 1 923 A. c. MOTT; JR

SMOKE} CONSUMING FURNACE Filed Sept. 15, 1920 4 sheets-sheet 1 Mar. 1923. 1,447,806

A. C. MO TT, JR

SMOKE CONSUMI NG FURNACE Filed Sept. 15, 1920 4 sheets-sheet z Mar. 6, 1923. w

A. C. MOTT. JR

SMOKE GONSIJMING FURNACE Filed Sept. 15, 1980 4 sheets-sheet 4 ."III II'I'iII Ii Patented Mar. 6, 1923.

warren s'rAres meter earner crates;

ABRAM C. MOTT, JR, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ABRAM COX STOVE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

SMOKE-CONSUMING FURNACE.

Application filed September 15, 1920. Serial No. 410,510.

To all whom it may concern:

Be it known that I, ABRAM C. Mo'r'r, Jr., a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Smoke-Consuming Furnaces, of which the following is a specification.

My invention relates to certain improvements in smoke consuming furnaces of the type illustrated in the patent granted to me on the 22nd day of March, 1921, No. 1,372,534.

One object of the present invention 1s to improve the construction of the furnace mentioned above and to make the secondary combustion chamber in sections ofsubstantially the'same width as the sections of the boiler to which the invention is applied.

- A further object of the invention is to improve the detail construction of the combustion 'chamber and to arrange it so that it can be applied either to a horizontal boiler or to a vertical boiler.

In the accompanying drawings:

Figure 1 is a side elevation illustrating my improved smoke consuming furnace; Fig. 2 is. a rear view; I Fig. 3 is a sectional view on the 111163 33, Fig. 2' Fig. 4c is a sectional plan 'view of the rear of the furnace on the line 44, Fig. 3';

Fig. 5 is a sectional view illustrating a detail of the invention on the line 5-5 Fig. 3; Fig. 6 is a sectional view on the line 6-6, Fig. 2;

Fig.7 is a perspective view of one of the secondary combustion chambers;

Fig. 8 is a vertical sectional view on the line 8-8, Fig. 9, illustrating a modification of the invention as applied to a vertlcal boiler; and

Fig. 9 is a sectional view on the l1ne 99, Fi 8.

Feferring to the drawings, 1 is the main portion of the smoke consuming boiler furnace. 2 are the boiler sections which are coupled together side by side and secured the boiler, in the present instance, is made" with an overhanging portion 7 and a back bottom of the legs of each section 8 is an offset portion forming a mud drum 11.

At the mud drum of each section is an openlng 12. The openings of one section are coupled to the openings of another section. At the upper end is an opening 13 forming a connection between the upper ends of the boiler sections so that water and steam circulate freely through all of the sections. The portion 7 of each section overhangs the primary combustion chamber 14, this portion has a thin depending section 15 provided with hollow ribs 16 arranged so as to allow the products of combustion to heat the water within the sectionsv more readily.

The above construction is common in this type of boiler but the combustion chamber usually connects directly with the low'er flues 9 at the rear.

Located at the back of the portion 1 of the furnace is a series of secondary combustion chambers 17, each chamber is of substantially the same width as the boiler sections 2. These sections overlap the joints of the boiler sections, as clearly shown in the drawings. Each chamber 17 is made of cast metal, and has flue openings 21 and 22. The opening 21 communicates with a flue opening 23 in the boiler sections, as clearly shown in Fig. 3. while the opening 22 communicates with the flue 9, as shown in said figure, so that the products of combustion pass from the primary combustion chamber through the flues 23 and openings 21 into the secondary combustion chambers 17, and from the secondary combustion chambers through the openings 22 into the flues 9.

Each casin 33 is recessed at 18 at the underside, anc l lugs 19 on the boiler project into these recesses and support the sections, a rod 26 extends back of the lugs and hooked bolt 25 engage the rod and extend throu 'h projecting lugs 24 on the section 17. t the upper end of each section 17 is a lug 27 through which passes a bolt 28 having a head resting in a recess'29 in the boiler section, as clearly shown in Fig. 3.

30 is a lining of non-conducting material extending at the back and at the top and bottom of the sections 17 of the secondary 110 combustion chamber. This lining enclosed in the top casing 31, back casing 32, and bottom casing 33. Each casing has lugs through. which pass bolts 34, which hold the casings together. Each section 17 has an inclined slot 35 at the upper end and a horizontal slot 36 at the lower end, formed by cutting a saw kert' in the back of each section as shown in Fig. 7. These kerfs form air passages, which permit the admission of air to the secondary combustion chamber. The upper passage communicates with a passage 37 formed in the outer casing 32 and the lower passage 36 communicates with a passage 38, also formed in the back casing 32, as clearly shown in Fig. 3. The slots 37 and 38 extend through the end casings 43, as well as through the back casings Between the end casings and the sections 17 is a non-conducting lining The end casings are secured to the hack casings by boltsee, which extend through lugs on the said parts.

39 is a series of vertical rods having heads counter-sunk in the bottom casings33 and having nuts at the upper end bearing upon the upper plate 31. These rods extend between thesections and tie them together vertically.

, 40 is a flue section mounted above. all of the sections 17 and the front of this section rests upon the boiler section 2 and has a plate 41 provided with a flue opening 42. This flue section 40 receives the products of combustion from the series of flues 10 and directs them to the opening 42,which comand there is a'single fine 23 communicating with the lower portion of each section, and a fine 9 communicating with the upper por tion of each section.

In a furnace, built as above described, the

products ofcombustion, as they are partially burned in thfeprimary combustion chamber, pass through the flues 23 into" the individual secondary combustion chambers 17 and, as they" pass through'these chambers air is admitted at the'lower portion of the chamber through the slots 36 and at the upper end through the slots so as to addsufiicient air to the partly consumed products of come hustion in order to continue the burning of the products as they pass through the secondary combustion chambers into theflues 9,?and by the time they reachthe chamber 4.0, they are practically consume cl'very little, it any, smoke is produced. By making the secondary combustion chamber in sect ns, I find. ha he p e ct-s "of cornhil' .1m ea-mac readily caasume l the Em il 21 cash AGQQP id 3 laugh life of the metal of the sections.

By making the secondary combustion chamber in sections they can be kept in stock and assembledin the same manner as the boiler sections.

lVhen it is desired to use a-boiler having three sections, then only twoof the secondary combustion chambersections are necessary, but, when a greater number are required, the number of secondary combustion chambers is proportionately increased.

In Figs. 8 and-9, I have illustrated my invention as applied to averti'calboiler, in which 3 is the base. 2 is the boilersection proper having a primary combustion chamher 14 and 2 is the top section, formed partly in the top'section-and partly in'the main section 2 are flues 9 and 10. 23

are flues communicating with the main coin- In the present in-.

hustionj chamber 1 1. stance, there are two of these flues, one located at one side of the chamber having the opening 42 leading to the chimney.

Located at each side of the boiler, as

shown in Fig. 9 are the secondary combustion chambers 17 built substantially in the same manner as the chamber 17 hereinbefore described, so that the products of combustion pass from the primary combustion chamber 14? through the fines 23* and through the secondary combustion chambers 17%, where additional air is supplied. The consumed products of combustion pass through the flue 9" into the central flue I0 leading to the chamber 40 Bolts 28 and 25 are screwed directly into threaded openings in the sections of the boiler and hold the secondary combustion in position. I"claim:, 1.-The' combination in afurnace having a primarycombustion chamber, ofa second"- ary combustion chamber located joutsideiif the furnace. and made in sections, each section being connected with the primary combustion chamber at'the lower end and With the smoke flue atthe upper endffand means for admitting air to the secondary com bustion chamber, -I i 2. The combination of a furnace having a primary combustion chamber and a smoke flue above said chamber and having a back wall with lower and upper flue passages chambers rigidly therein; a series of independent secondary cembustionchamber the lower portionof each secgndary. chamber communicating.

of the furnace; a series of secondary combustion chambers at the back of the furnace and communicating at the lower end with the primary combustion chamber and at the upper end with the fines; and sectiona-l casings inclosing the secondary combustion chambers, the secondary conbustion chambers being so proportioned and ar ranged that their joints are out of line with the joints of the sections of the boiler.

4:. The combination of a furnace structure having a primary combustion chamber and having fiues above said combustion chamber, said furnace structure having lugs at the back; a secondary combustion chamher at the back of the furnace structure and recessed at the underside to receive the lugs and connected at the lower end with the primary combustion chamber and at the upper end with the fiues; and means for holding the secondary combustion chamber to the furnace.

5. The combination of a furnace structure having a primary combustion chamber and fines above the chamber; a series of secondary combustion chambers made of cast metal and located at the back of the furnace structure, said combustion chamber casting being in contact with the back of the'furnace structure and having flue openings at the bottom and at the top, the furnace structure havin corresponding flue openings, onecommunicating with the combustion chamber and the other with the furnace flue; a non-conducting covering inclosing the exposed portions of said combustion chambers; and an inclosing casing for the non-conducting material.

ABRAM C. MOTT. JR. 

